<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../../react18/react.development.js"></script>
    <script src="../../react18/react-dom.development.js"></script>
    <script src="../../react18/babel.min.js"></script>
</head>

<body>
    <div id="app"></div>
    <script type="text/babel">
        class App extends React.Component {
            constructor() {
                super()
                this.changeWeaHandle = this.changeWeaHandle.bind(this)
            }
            state = {
                isHot: true
            }
            render() {
                const { isHot } = this.state
                return (
                    <div>
                        <button onClick={this.changeWeaHandle}>按钮</button>
                        {
                            isHot ?
                                <div>
                                    <h1>好热</h1>
                                    <p>热的我都要穿棉袄了</p>
                                </div> : <div>
                                    <h1>好冷</h1>
                                    <p>冷的我都要穿T恤了</p>
                                </div>
                        }
                    </div>
                )
            }
            changeWeaHandle() {
                let { isHot } = this.state
                this.setState({
                    isHot: !isHot
                })
            }
        }
        const root = ReactDOM.createRoot(document.getElementById('app'))
        root.render(<App />)
    </script>
</body>

</html>